6、conquer 征服；占领

7、because of 因为，由于

because of 是介词短语，后面跟名词、代词、动名词或名词性从句。而because是连词，后面跟句子，引导原因状语从句。

He came to work late because of getting up late.

He came to work late because he got up late.

他因为起床晚了，所以上班迟到了。